Box with double bevel edges
Try to keep your topology as quads. Using Ngons is only going to give you trouble when you want to subdivide.

Start with a cube.

Inset the top face.

Extrude the center face and bring it down on the Z axis to get the basic shape of the box.



Select the outer loop edge (press and hold Alt and Right Click with the mouse) and bevel it (CtrlB)

Do the same with the inner edge loop.



Then select the inner edges and bevel them as well.